docs: def post_refund_request(self, id, **data):
          """
          POST /refund_requests/:id/
          Update a :format:`refund-request` for a specific order. Each element in items is a :format:`refund-item`
          error NOT_AUTHORIZED
          Only the order's buyer can create a refund request
          error FIELD_UNKNOWN
          The refund request id provided is unknown
          error INVALID_REFUND_REQUEST_STATUS
          The refund request is not the correct status for the change
          """
          
          return self.post("/refund_requests/{0}/".format(id), data=data)